what is curve sketching, what would be an ex of that?

Question

is the closed interval method the same as max and min?

Answer 1

Hi. If you mean geometrically then try this for an example. http://www.kxcad.net/icem_surf/icemsurf/online_help_english/ReferenceManual/wwhelp/wwhimpl/common/html/wwhelp.htm?context=ReferenceManual&file=crv_cre_e9.html
The math group should have a better answer if you mean using calculus.